You are creating a customer database for a Football team. Draw a Project network
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Question
You are creating a customer database for a Football team. Draw a Project network diagram given the information below. Complete the forward and backward pass, compute activity slack and identify the critical path. How long will this project take? Chap ACTIVITY ID DESCRIPTION PREDECESSOR TIME (DAYS) Systems design None Subsystem A design A Subsystem B design Subsystem C design Program A Program B Program C Subsystem A test E Subsystem B testF Subsystem C test G Integration Integration test K 2 omm hapter H,I,J iven the ompute nd slack iew this 1) Evaluate the differences between bottom-up and top-down estimating approaches? Under what conditions would you prefer one over the other? 2) Analyze how will you identify the quality of a IS project using 4 quality tools with!5 steps of six sigma? Explain using suitable explanation.Explanation / Answer
1)Answer:
Top-down estimates are typically used in the project conceptual phase, and depend onsurrogate measures such as weight, square feet, ratios. Top-down methods do notconsider individual activity issues and problems. Top-down estimates are good forrough estimates and can help select and prioritize projects.Bottom-up time and cost estimates are usually tied directly to the WBS and a workpackage. These estimates are made by people familiar with the task, which helps togain buy-in on the validity of the estimate. Use of several people should improve theaccuracy of the estimate. Bottom-up estimates should be preferred if time to estimateis available, estimating cost is reasonable, and accuracy is important.
There are several differences between bottom-up and top-down estimating approaches. However,it all boils down to whether you want to risk time or money when requesting an estimate. Meaning, if you chose bottom-up that estimate will be cost and time important, fixed price contract and customer wants detailed. Bottom-up estimating approach is less risky. Top-down estimating approach on the other hand is highly uncertain, it is used for internal and small projects and involves strategic decision-making. Usually, top managers and CEO’s go with top-down estimates due to experience in the job and confidence and also they want to bit the competition. Examples of cases where bottom-up estimating approach is used is when companiesbuild up they budget for the year. Top-down example would be an estimate given to you at the bank for the purchase of a house. It requires little time and it’s fairly accurate
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